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Black Kuhli Loaches

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ok sorry i posted this in the wrong section before haha (sorry im a newbie) anyways sometimes i will go to petsmart and ocasionally buy a fish or two ( i normally purchase from a specialty fish store but as i said once in a while from petsmart the thing is ive wanted a black kuhli loach the thing is is I go in petsmart see them and leave, then i go back maybe a day or two later and most of them are dead. do you think its something wrong with petsmart filtration/water or are they just a weak fish in general ?

In my particular petshop I think most of theirs die of stress. They provide basically NO hiding places for them. The 9 that I have are nice and healthy. You'll get different opinions on them being hardy though. Some people say they are, others don't. The only thing I've found is that they are extremely sensitive to ammonia, (which isn't really surprising).

They are IME a VERY hardy fish, surprisingly so for a bottom feeder. Petsmart houses them with all those other sick fish in confined areas and they are constantly lifting up their hiding spots and digging through gravel... Stress probably gets to them fast.

I got all of mine from Petsmart. Ive found you just have to get em, rush em home, and put them in a nice quarantine with hiding places and dont bug them except to feed for a few weeks at least. I dont suggest gravel though, or you will never get them back out of that tank...